A potential reddish orange emitting phosphor Ca2BO3Cl:Eu3+ for white light-emitting diodes

A series of phosphors Ca2BO3Cl:Eu3+ were synthesized by using a high-temperature solid-state reaction technique, and their UV-vis luminescence properties were investigated. The f-f transitions of Eu3+ in the host lattice were assigned and discussed. The excitation and emission spectra indicate that this phosphor can be effectively excited by ultraviolet (394 nm), and exhibit reddish orange emission corresponding to the 5D0→7FJ (J=0, 1, 2) transitions of Eu3+. The influence of the doping concentration and charge compensators on the relative emission intensity of Eu3+ was investigated, and the optimum doping concentration is 0.04. The critical distance Rc was estimated to be 17.1 Å in terms of the concentration quenching data. The present study suggests that Ca2BO3Cl:Eu3+ can be a potential candidate as an UV-convertible phosphor for white light-emitting diodes (LEDs).